|Publication number||US6092695 A|
|Application number||US 09/020,983|
|Publication date||Jul 25, 2000|
|Filing date||Feb 10, 1998|
|Priority date||May 11, 1992|
|Also published as||EP1007974A1, US6244474, WO1999001770A1|
|Publication number||020983, 09020983, US 6092695 A, US 6092695A, US-A-6092695, US6092695 A, US6092695A|
|Inventors||Herbert H. Loeffler|
|Original Assignee||Cytologix Corporation|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (41), Referenced by (164), Classifications (50), Legal Events (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application is a Continuation-in-Part of Ser. No. 08/887,178, filed Jul. 2, 1997, U.S. Pat. No. 5,947,167, which is a Continuation-in-Part of Ser. No. 08/251,597, filed May 5, 1994. U.S. Pat. No. 5,645,114, which is a Continuation-in-Part of Ser. No. 07/881,397, filed May 11, 1992, U.S. Pat. No. 5,316,452 the entire teachings of which are incorporated herein by reference.
This invention relates to an improved pump mechanism for dispensing small aliquots of a liquid, such as a biological reagent. It may serve as part of an apparatus which dispenses a plurality of reagents to be dispensed in small volumes.
Current methods for dispensing reagents generally use pumps which require the priming of tubing lines leading into and out of a pump. When the pumping is finished, the tubing lines must be flushed before a different reagent can be pumped, lest cross-contamination of reagents occur. Because of the need for priming and clearing tubing lines, such types of pumps are not easily interchangeable.
Pumping systems using a syringe housing ("syringe pumps") are well known to those in the field. The liquid can then be accurately dispensed by applying a precise pressure on the plunger, usually by an electromechanical actuator. The distance that the plunger is depressed directly controls the amount of fluid to be dispensed. Such syringe pumps have two advantages: 1) the absence of tubing lines leading into and out of a pump which must be primed and flushed, and 2) the separation of the wetted components from the electromechanical controlling elements.
Such syringe pumps are useful in situations where repetitive dispensing of precise amounts of liquid are required. A drawback of such syringe pumps is that interchanging syringes on a single electromechanical actuator requires that the actuator mechanism be realigned with the position of the syringe plunger that is being inserted. In circumstances where the syringes need to be changed often in order to change the dispensed reagent, the need for repetitive manual intervention to align the electromechanical actuator with the position of the syringe plunger is a disadvantage.
A modified form of syringe pump is presented in U.S. Pat. No. 4,844,868 to Rokugawa and U.S. Pat. No. 5,232,664 to Krawzak et al. In those devices, liquid is drawn into a syringe from a reservoir through a check valve and then dispensed through a second check valve. Unfortunately, the increased complexity of sliding seals, valves with balls and springs and multiple parts to be assembled renders such designs relatively costly to manufacture. This is a particular disadvantage where the liquid dispenser is meant to be disposable.
U.S. Pat. Nos. 5,645,114 and 5,316,452 to Steven A. Bogen and Herbert H. Loeffler and assigned to the Assignee of this invention prevent a liquid dispensing pump comprising a metering chamber attached to a liquid reservoir. The reservoir is a syringe barrel, sealed at the top by a moving plunger. As liquid is dispensed, the plunger moves progressively deeper into the reservoir/syringe barrel. The plunger thereby serves to exclude air and prevent spillage of the liquid contained within the reservoir. The metering chamber comprises a flexible housing with two unidirectional duck-billed valves. As the housing is compressed, liquid is ejected out of the chamber through the lower valve. As the compression force is released, the flexible housing resumes its native (expanded) state, thereby drawing liquid into the housing from the reservoir.
By positioning a plurality of such liquid dispensers on a moving platform, a single electromechanical actuator can selectively dispense from a variety of dispensers. In this manner, the cartridge pumps are interchangeable.
The present invention relates to an improvement in the liquid dispenser presented in the Bogen et al. patents. In particular, it presents a liquid dispenser which uses novel valves to provide more consistent operation. The novel valves have more reproducible cracking pressures, minimize the formation of drops at the dispenser outlet and provide more controlled flow of liquid ejected from the dispenser.
In a preferred embodiment, a cartridge pump comprises a liquid reservoir for containing a liquid, such as a biological or chemical reagent. The reservoir has a liquid flow outlet at the bottom thereof to which a metering chamber is directly connected. The metering chamber comprises a compressible housing having a non-compressed shape. A one-way inlet valve and a one-way outlet valve are provided at respective ends of the compressible housing and are aligned in the same direction to allow unidirectional flow from the reservoir through the housing. The compressible housing may be compressed for the unidirectional ejection of a volume of liquid from the metering chamber. The compressible housing returns to the non-compressed shape after cessation of compression to draw an additional volume of liquid into the metering chamber from the reservoir.
The cartridge pump may be attached onto a moving platform by means of a feature on the side of the cartridge pump. The mating receptacle for the feature is on the moving platform. The moving platform actually contains a multiplicity of suitable attachment sites for cartridge pumps, allowing it to carry a multiplicity of liquids. By moving the platform so as to position a desired cartridge pump adjacent to an electromechanical actuator, the instrument can select which liquid will be dispensed. If a different chemical or biological procedure is subsequently required, the cartridge pumps can be replaced with other cartridge pumps containing the necessary reagents for the new procedure. Therefore, the cartridge pump design allows an instrument to be extraordinarily versatile.
A novel valve design is incorporated into the preferred liquid cartridge pump dispenser. The valve features a high seating force and a lower, moderate opening ("cracking") force, facilitating leak-free operation. In particular, each check valve at the inlet and outlet of the compressible elastomeric housing of a metering chamber comprises a flexible membrane having an aperture. A valve seat fixed to the housing seats into the aperture of the flexible membrane and causes the flexible membrane to be deformed. The deformed flexible membrane has an elastic restoring force which causes the membrane to act upon the valve seat to provide a positive liquid seal. Preferably, the valve seat is conical and extends from a rigid disk. The preferred outlet check valve further includes a guidepost extending from the conical valve seat and a tubular nozzle extending from the flexible membrane about the aperture and the guidepost. It is preferred that at least one of the membranes be formed as a unitary part with the compressible elastomeric housing.
Preferably, at least the liquid reservoir is pivotably mounted in a rigid plastic housing with the metering chamber suspended from the reservoir. As the electromechanical actuator drives a compression member to compress the meter chamber against a fixed back-supporting surface, the reservoir and housing tilt slightly. As the dispenser tilts within its rigid plastic housing, the metering chamber receives compression force that is distributed between the front (by the compression member of the electromechanical actuator) and the back (by the fixed back-support), thereby avoiding kinking and bending of the housing and the resultant unpredictable directions of dispense. This tilting feature also results in a slight arc in the path of dispensed liquid, an advantage if the liquid needs to be spread out over a surface. Moreover, the tilt allows the fluid stream to interrupt a fixed optical beam, for detection of liquid dispense.
The preferred reservoir is formed from a flexible plastic bag. The reservoir may be connected to the metering chamber prior to filling by means of a mechanical joint. A small hole at the bottom of the bag is positioned over a larger hole at the top of the metering chamber fluid inlet valve. A cylindrically-shaped hollow plug is then pressed into the aligned holes from above, causing the two apertures to seal to each other. The reservoir (in the form of a flexible bag) may also be joined to the metering chamber inlet by other means, such as by the application of heat, ultrasonic, RF, or adhesive sealing methods. In addition, the liquid reservoir may be made of a unitary piece with the metering chamber during manufacture. The bag is filled from the top, and the bag is then sealed as by a heat seal or a mechanical clip. The bag may then be suspended from a pivot pin in a rigid chamber.
With the present invention, a liquid such as a reagent is conveniently supplied in a disposable cartridge. The liquid bag is filled and, prior to or after filling, is coupled to the compressible metering chamber and check valves. The flexible bag is then enclosed in a rigid housing, preferably by suspension from a pivot. The metering chamber remains exposed for compression by an external compression member once the cartridge has been placed on a suitable dispenser platform so that liquid can be readily dispensed through the outlet check valve.
A filter may be provided in the reservoir and/or metering chamber to trap particulates and prevent clogging of the valves.
The interchangeable pump cartridge of the present invention can be accepted into a dispensing assembly with an electromechanical actuator regardless of the amount of liquid in the cartridge reservoir. The cartridge maintains a separation of the wetted and electromechanical components and does not require priming of tubing lines before and after pumping. Moreover, it can be produced inexpensively and therefore disposed of when the reagent in the cartridge is exhausted.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1A is a cross-sectional view of the pump cartridge, including the liquid reservoir bag and attached metering chamber attached to and contained within the rigid outer housing. The liquid metering chamber is at rest, without the application of a compressive force.
FIG. 1B is a bottom view of the rigid outer housing of FIG. 1A with the metering chamber extending therethrough.
FIG. 1C is a cross-sectional view as FIG. 1A, except that it shows the liquid metering chamber being compressed by the compression member and a back surface separate from the rigid housing.
FIG. 2A is a cross-sectional view of a preferred metering chamber, including the inlet and outlet valves.
FIG. 2B is a similar cross-sectional view as FIG. 2A, except that it shows the metering chamber in the compressed state, with ejection of liquid through the outlet valve.
FIG. 3 is a cross-sectional view of the outlet valve at the bottom of the metering chamber.
FIG. 4 is a cross-sectional view of the inlet valve at the top of the metering chamber and the mechanical joint to the reservoir bag.
FIG. 5A is a cross-sectional view of an alternative embodiment of the reservoir and the liquid metering chamber, wherein the reservoir and metering chamber housing are manufactured as a single component.
FIG. 5B is a similar cross-sectional view as in FIG. 5A, except that it shows the metering chamber in the compressed state, with ejection of liquid through the outlet valve.
FIG. 6 is a perspective view of two cartridge pumps, one inserted into the supporting platform, the other about to be inserted from above.
FIG. 7 is a perspective view of the platform carrying two cartridge pumps.
Referring to FIG. 1A, the cartridge pump comprises a pump cartridge reservoir 3 in the form of a hollow flexible bag. The reservoir is attached to a metering chamber 13 through which liquid is dispensed. A liquid dispensing assembly is the combination of the reservoir 3 and the metering chamber 13. The reservoir 3 is suspended within an outer rigid housing 2 by means of a pivoting pin 1. In this manner, the entire liquid dispensing assembly, including the reservoir 3 and metering chamber 13, can pivot during the dispensing operation as discussed below. A cartridge pump is the liquid dispensing assembly in combination with the rigid outer housing 2.
An elongated T-shaped feature 4 is attached to the outer aspect of the rigid outer housing for attachment to a moving platform 31 on which the cartridge pump rests (see FIG. 6). The cartridge pump also provides a guiding slot 5 (FIG. 1B) which bounds the metering chamber laterally to prevent side-to-side movement of the metering chamber 13. The guide slot provides for a certain degree of front-to-back movement, as desired by the pivoting motion of the liquid dispenser, as described in the paragraph below.
In order to dispense (FIG. 1C), compression member 12 is caused to compress upon the metering chamber 13 by means of an electromechanical actuator, such actuators being well known in the art. As member 12 contacts metering chamber 13, the entire liquid dispensing assembly is caused to tilt slightly upon the pivot 1. The tilt results in the metering chamber contacting the back supporting surface 6, shaped similarly to the compression member 12 and either fixed to the rigid housing 2 as in FIG. 1A or to a supporting platform as in FIGS. 1C and 7. The tilting action of the liquid dispenser, such that the metering chamber moves into the back surface 6, causes the compressive forces to be equally distributed between both the front and back, from the front by means of member 12 and the back by means of back surface 6. This results in a symmetric deformation of the metering chamber 13. Consequently, the overall direction of the metering chamber 13 continues to be relatively straight down. Without the tilting action, a unidirectional application of compressive force upon the lower portion of the metering chamber 13 might cause a kink in the direction of the compressing member, causing liquid to be dispensed at wide and unpredictable angles. The tilting nature of the liquid dispensing assembly eliminates the kinking and causes the liquid stream to be dispensed over a slight arc through a range of tilt from initial to full compression. This slight arc over the angle of the tilt during compression is an additional advantage if the dispensed liquid has to be slightly spread out over a surface.
As an alternative, the reagent supporting platform could be configured to restrain the metering chamber from tilting and kinking, but placing the cartridge on the platform would then be more difficult.
A few biologic stains or dyes precipitate spontaneously upon storage. If precipitate enters into the valve, it could potentially cause a clog to form within one or both of the metering chamber valves. In order to prevent this occurrence, a filter 43 is placed at the bottom of the liquid reservoir, filtering liquid before entry into the metering chamber. The filter is preferably a depth filter, made of a non-woven fibrous material such as polyester. The precipitate is trapped within the filter, preventing its entry into the metering chamber valves. A smaller filter 45 may optionally be placed within the metering chamber itself, to further trap any precipitate and protect the outlet valve from clogging.
Referring to FIGS. 2A and 2B, the metering chamber 13 is comprised of two unidirectional valves at the top and bottom of the metering chamber housing 16. Each valve comprises a small, inflexible valve disk 17 (bottom valve) and 18 (upper valve) and a flexible elastomeric membrane 15 (upper valve) and 25 (bottom valve). Although each valve operates in a similar fashion, the valves are also specifically designed to perform additional functions besides just serving as check valves. In this manner, the number of individual parts to accomplish the various functions is minimized.
Referring to FIG. 3, the valve disk 17 is shown to comprise an inflexible plastic part that is preferably injection molded. The disk 17 seats into a receptacle in the elastomeric housing. The seating receptacle is formed by a 90° angle bend in the housing 16 below the disk 17 and a ridge 19 in the housing above the disk 17. The valve disk 17 is inserted into the valve receptacle from above. As the disk 17 is depressed into the housing 16, it forces the ridge 19 to bend and/or compress in a lateral direction, allowing the inflexible disk 17 to pass and lock into place below the ridge 19.
The valve disk 17 has a central conical projection 21 that interacts with and deforms the flexible membrane 25. In a preferred embodiment, the flexible membrane 25 is formed from the same material as and of a unitary piece with the metering chamber housing 16. In fact, they are different aspects of the same part formed during fabrication (molding). The deformation of the flexible membrane 25 results in a restoring force being exerted by the flexible membrane 25 to return to its native nondeformed state. That restoring force causes the flexible membrane 25 to press against the conical projection 21. Under resting conditions, the valve is closed and a positive liquid seal is formed by the pressure (restoring force) of the flexible surface 25 acting upon the conical portion 21. The disk also has a small, eccentrically-located perforation 26 that allows liquid contained within the metering chamber 13 to freely pass below the valve disk 17. Liquid does not exit the cartridge pump because of the seal formed by the action of the flexible surface 25 upon the conical portion 21 of the valve disk 17. The conical shape of the valve seat 21 allows for proper sealing within a tolerance range of diameters of the aperture centered in the membranes 15, 25.
When the compression member 12 compresses the metering chamber 13, the liquid pressure is transmitted through the valve disk perforation 26 across the entire surface of the flexible surface 25. This causes the flexible surface 25 to deform away from the conical portion 21 of the valve disk 17 as illustrated in FIG. 2B. In this manner, liquid passes through the valve seal. The conical portion 21 of the valve disk 17 extends downward below the leaflet, in a cylindrically shaped liquid dispense guidepost 20. This liquid dispense guide 20 has a diameter less than the diameter of the membrane aperture and helps ensure that the liquid flows straight downwards, in a manner analogous to pouring liquid down along the surface of a stirring rod. In the preferred embodiment, illustrated in FIGS. 2B and 3, a tubular nozzle 40 surrounds the aperture of membrane 25 to also guide the liquid stream 42. (The nozzle is not included in the embodiment of FIGS. 1A and 1C.) As the liquid pressure from the dispense diminishes, the elastomeric force of the flexible membrane 25 causes it to again contact the conical portion 21 of the valve disk 17, thereby re-establishing the seal.
Caking of precipitated material upon the valve seal is minimized by having a very small volume of liquid contained downstream of the valve seal. In addition, this design minimizes a previous problem of droplets of liquid being suspended from the nozzle after liquid dispense. Suspended liquid droplets remain suspended only so long as there is an inside aperture wall to which they can attach by their capillary action. Surface tension holds the droplet together. In this embodiment, the aperture formed by the flexible membrane 25 is so small (less than 1 mm in diameter) and the depth of the nozzle 40 is so minimal that there is insufficient capillary force for large droplets to remain attached. The droplet tends to fall, clearing the nozzle 40 of liquid.
Referring to FIG. 4, the upper, inlet valve disk 18 can be designed so as to accommodate a mechanical joint for the attachment of the liquid reservoir 3. The joint is formed by the apposition of plug 14 into a recess of valve disk 18. The joint is formed by trapping the lowermost aspect of the liquid reservoir bag 23 between the plug 14 and the recess in valve disk 18, a hole formed in the bag 23 being smaller in diameter than the recess of the disk 18. The plug 14 is sized for an interference fit and is pressed into the recess of the valve disk 18. The result is that the flexible film from which the liquid reservoir 3 is fabricated is stretched and drawn into the recess of the valve disk 18, forming a tight seal. This permits use of materials that are not compatible for heat or adhesive sealing. Liquid contained within the liquid reservoir 3 can still pass through a hole 24 running through the middle of the plug 14.
Unlike the lower flexible membrane 25, the flexible membrane 15 of the upper valve is molded separately from housing 16 and inserted from above. Together with the upper valve disk 18, they are secured into a valve receptacle at the top of the metering chamber housing 16. The upper valve receptacle is formed by ridges in the inner wall of the chamber housing 16, such ridges being positioned above (ridge 27) and below (ridge 28) the valve disk 18 and flexible membrane 15 components.
The inlet (upper) valve functions in a similar manner to the outlet valve. The flexible surface 15 acts upon the conical portion of valve disk 18 to create a seal. Liquid from the reservoir 3 can readily pass through the valve disk 18 through a perforation 29. However, the liquid is prevented from passing into the metering chamber by the seal formed by the sealing action of the flexible membrane 15 upon the conical portion of valve disk 18.
After a liquid dispense, the metering chamber housing 13 re-expands to its original shape. As this occurs, a negative pressure develops within the chamber 13. This negative pressure is exerted over the entire lower surface area of the flexible membrane 15, causing it to deflect downwards to break the liquid seal. A low pre-load allows liquid to flow freely even at low pressure differences. As liquid refills the chamber 13 from the liquid reservoir 3, the negative pressure diminishes, causing the flexible surface 15 to resume its original position, thereby resealing the valve.
The design of the valves provides reproducible, high sealing forces combined with a lower, more moderate opening ("cracking") forces. During a resting state with near zero pressure differential across the flexible membranes 15, 25 the elastomeric sealing force applied by the flexible membrane is exerted on the very small circular area where the conical surfaces of valve disks 17 and 18 contact the edges of the flexible membranes 25 and 15. Since sealing pressure=force/area, and since the contact area is very small, the compression of the seal is relatively high, resulting in reliable, leak-free sealing. On the other hand, to break the liquid seal, the hydraulic pressure is applied to the whole, relatively large surface area of the flexible membrane 25, 15. Since hydraulic pressure differential×area=force, liquid acting upon a relatively large area produces a relatively large opening force with only moderate hydraulic pressure. When the pressure is reversed, as on membrane 15 during metering chamber compression or on membrane 25 during expansion, this principle results in a very reliable seal, preventing back flow.
In conclusion, small sealing area defined by the apertures in the membranes 15, 25 and large surface areas of the membranes result in large static sealing pressure and low hydraulic cracking pressure. These advantages are obtained with a very low profile.
An additional advantage of this valve design is that the size of the conical projection 21 of the valve disk 17 can be calibrated during manufacture to yield a consistent cracking pressure. Namely, if the conical valve seat 21 is larger, then the flexible surface 25 is deflected to a greater degree at rest. This results in an increased (preload) elastomeric force at the contact surface of the flexible surface 25. In order to deflect the valves under such circumstances, increased hydraulic pressures will be required (i.e., higher cracking force). If a smaller conical valve seat 21 is manufactured, then the valve will have a lower cracking pressure. For example, the upper (inlet) valve does not require a high cracking pressure to prevent leakage. Therefore, it preferentially has a low preload force.
An alternative method of manufacture is depicted in FIGS. 5A and 5B. In this embodiment the liquid reservoir 3 and the metering chamber housing 16 are manufactured as a single part. Namely, the reservoir is continuous with the chamber housing, both being manufactured of the same material, such as silicone rubber. This alternative construction minimizes the number of parts to be assembled and eliminates the need for a friction seal between the liquid reservoir 3 and the liquid metering chamber 13.
Referring to FIG. 6, two cartridge pumps 29 and 30 are displayed. Cartridge pump 29 is attached to a rotating platform 31 through the interaction of a feature 4 with one of many grooves 32 in the platform 31. The platform 31 can be precisely rotated under computer control. Cartridge pump 30 is shown above the platform 31, to illustrate the interaction of the elongated T-shaped feature 4 with a groove 32. As the cartridge pump is lowered onto the platform 31, the narrow portion of the feature 4 inserts into the groove 32.
Referring to FIG. 7, two cartridge pumps 29 and 30 are shown inserted onto a movable platform 31. The platform is shown positioned such that cartridge pump 30 is in position for dispensing by the fixed location compression member 12. Finger-holds 33 are positioned on both sides of the cartridge pump rigid housing, facilitating easy grasp by the technician. A bar code 34 is displayed on the outside of the rigid outer housing 2 to identify the type of reagent contained within the cartridge pump, a lot number, expiration date, and total volume of the reservoir 3. Windows 35 permit viewing of the reservoir to determine liquid level.
In the embodiment of FIGS. 6 and 7, the base of the platform 31 serves as a back support 6 for the liquid metering chamber 13. Alternatively, the back support 6 could be part of the rigid outer case 2. Not previously illustrated but shown in FIG. 7 are side walls 36 which cover the metering chamber. As the member 12 compresses the liquid metering chamber 13 (not shown in FIG. 7), the liquid dispensing assembly tilts as previously discussed. The liquid metering chamber 13 then contacts the base 6 of the platform 31 on the side of liquid metering chamber 13 opposite the member 12, leading to compression of the liquid metering chamber 13.
Filling of the liquid reservoir is accomplished after the entire liquid dispensing assembly is assembled. During initial fabrication, the top of the reservoir 3 is open. Once assembled, liquid is inserted into the reservoir from the upper open end. The flexible film from which the reservoir 3 is fabricated is then heat-sealed or clamped with a mechanical clip. Air is purged from the metering chamber by compressing the chamber and allowing liquid to enter. When most of the air is evacuated from the metering chamber, inverting the liquid dispensing assembly facilitates the rise of any residual bubbles so that they can be squeezed out of the outlet valve. The dispensing assembly is then supported on the pin 1 and the cartridge housing is closed.
The outer rigid housing 2 is preferably fabricated as two pieces that mate together in a clamshell configuration. In this preferred embodiment, the liquid dispensing assembly is mounted on a pin 1 of one of the rigid housing 2 halves. The metering chamber is positioned so as to be contained within guide slot 5. Then, the other half of the rigid outer housing 2 is mated with the first half and secured with mechanical interlocks, solvent bonding or other means. The housing 2 may also be manufactured as a single part, with a flexible hinge, that can be folded and snapped together around the liquid dispense assembly.
The liquid dispensing system of the invention is preferably implemented as a direct substitute for the dispenser used in the slide handling system presented in U.S. application Ser. No. 08/887,178, but many other applications can be envisioned.
While this invention has been particularly shown and described with references to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Those skilled in the art will recognize or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the invention described specifically herein. Such equivalents are intended to be encompassed in the scope of the claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3164304 *||May 8, 1961||Jan 5, 1965||Standard Thomson Corp||Liquid dispensing apparatus for small quantities|
|US3346001 *||May 4, 1965||Oct 10, 1967||Irving Terry||Backflow preventing valve|
|US3768704 *||Oct 10, 1972||Oct 30, 1973||Tech Sa D Et||Fluid dispenser|
|US3850190 *||Sep 17, 1973||Nov 26, 1974||Mark Controls Corp||Backflow preventer|
|US3955930 *||Apr 7, 1975||May 11, 1976||Justin Joel Shapiro||Automatic dilutor having coupled diluent and reagent plungers|
|US4057177 *||Jan 18, 1977||Nov 8, 1977||Laauwe Robert H||Valved squeeze bottle for viscous products|
|US4095722 *||Mar 18, 1976||Jun 20, 1978||Miller Kenneth L||Dripless dispenser and method of dispensing a flowable material|
|US4102476 *||Feb 22, 1977||Jul 25, 1978||Ciba-Geigy Corporation||Squeeze bottle dispenser with air check valve on cover|
|US4130224 *||Oct 8, 1976||Dec 19, 1978||Envair, Inc.||Viscous liquid dispenser|
|US4141474 *||Jul 9, 1976||Feb 27, 1979||Kenova Ab||Self-closing closure utilizing a single diaphragm|
|US4220285 *||Oct 17, 1977||Sep 2, 1980||Spray Plast S.r.1||Hand sprayer for liquids|
|US4268226 *||Jul 26, 1978||May 19, 1981||Dunlop Limited||Tube type pump and wave motor|
|US4324097 *||Dec 3, 1980||Apr 13, 1982||Firma Carl Freudenberg||Non-return valve|
|US4334640 *||Oct 14, 1980||Jun 15, 1982||Douwe Egberts Koninklijke Tabaksfabriek-Koffiebranderijen-Theehandel B.V.||Exchangeable concentrate container for beverage dispensing machines|
|US4526294 *||Feb 22, 1983||Jul 2, 1985||Glasgeratebau Hirschmann||Dispenser for dispensing liquids in controlled quantities from a bottle|
|US4573612 *||Nov 28, 1983||Mar 4, 1986||Kimberly-Clark Limited||Liquid soap dispenser|
|US4690005 *||Nov 1, 1985||Sep 1, 1987||Labstystems Oy||Diluting dosage device|
|US4699300 *||Jan 12, 1987||Oct 13, 1987||Blake William S||Two piece dispensing closure with positive shutoff|
|US4722372 *||Aug 2, 1985||Feb 2, 1988||Louis Hoffman Associates Inc.||Electrically operated dispensing apparatus and disposable container useable therewith|
|US4747520 *||Feb 27, 1987||May 31, 1988||Lane Sr Donald W||Device for dispensing liquid from a bottle|
|US4760939 *||Apr 24, 1986||Aug 2, 1988||Jencons (Scientific) Limited||Liquid dosing device with digital display|
|US4775301 *||Jan 19, 1988||Oct 4, 1988||Cartwright Garry E||Oscillating electromagnetic pump with one-way diaphragm valves|
|US4838887 *||Dec 15, 1987||Jun 13, 1989||Shiley Infusaid Inc.||Programmable valve pump|
|US4844868 *||Jun 11, 1986||Jul 4, 1989||Kabushiki Kaisha Toshiba||Automatic chemical analysis reagent distribution and analysis apparatus|
|US4846636 *||Mar 16, 1988||Jul 11, 1989||Critikon, Inc.||Parenteral solution pump assembly|
|US4967940 *||Feb 21, 1989||Nov 6, 1990||Minnesota Mining And Manufacturing Co.||Method and apparatus for precision squeeze tube valving, pumping and dispensing of work fluid(s)|
|US4974754 *||Oct 31, 1988||Dec 4, 1990||Alphasem Ag||Metering apparatus for metering and delivering fluid or pasty substances and use of said metering apparatus|
|US5082150 *||May 1, 1990||Jan 21, 1992||Steiner Company, Inc.||Liquid dispensing system including a discharge assembly providing a positive air flow condition|
|US5100030 *||May 24, 1990||Mar 31, 1992||Inopak Ltd.||Fixtures for fluid dispensing bags|
|US5232664 *||Sep 18, 1991||Aug 3, 1993||Ventana Medical Systems, Inc.||Liquid dispenser|
|US5316452 *||May 11, 1992||May 31, 1994||Gilbert Corporation||Dispensing assembly with interchangeable cartridge pumps|
|US5320845 *||Jan 6, 1993||Jun 14, 1994||Py Daniel C||Apparatus for delivering multiple medicaments to an eye without premixing in the apparatus|
|US5356038 *||Jan 21, 1993||Oct 18, 1994||Sprintvest Corporation N.V.||Wall mountable cream tube dispenser|
|US5433351 *||Apr 16, 1993||Jul 18, 1995||Misuzuerie Co., Ltd.||Controlled liquid dispensing apparatus|
|US5551487 *||Mar 10, 1995||Sep 3, 1996||Hewlett-Packard Company||Micro-dispenser for preparing assay plates|
|US5595707 *||Dec 9, 1994||Jan 21, 1997||Ventana Medical Systems, Inc.||Automated biological reaction apparatus|
|US5597093 *||Feb 24, 1995||Jan 28, 1997||Lee; Gary K.||Push pad unit for dispensing fluids|
|US5645114 *||May 31, 1994||Jul 8, 1997||Cytologix Corporation||Dispensing assembly with interchangeable cartridge pumps|
|EP0167274A2 *||May 30, 1985||Jan 8, 1986||Garry Ernest Cartwright||Pump|
|EP0268237A2 *||Nov 16, 1987||May 25, 1988||Abbott Laboratories||Apparatus and process for reagent fluid dispensing and printing|
|WO1994029187A1 *||May 20, 1994||Dec 22, 1994||Billy Nilson||A self-closing arrangement|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6591874||Aug 12, 2002||Jul 15, 2003||The Coca-Cola Company||Process for the manufacture and delivery of small beverage pouches|
|US6662829||Mar 26, 2003||Dec 16, 2003||The Coca-Cola Company||Process for the manufacture and delivery of small beverage pouches|
|US6736796 *||Nov 26, 2001||May 18, 2004||Nili-Med Ltd.||Fluid drug delivery device|
|US6745763 *||Feb 16, 1999||Jun 8, 2004||Garth T. Webb||Vaporizing device for administering sterile medication|
|US6769231 *||Jul 19, 2001||Aug 3, 2004||Baxter International, Inc.||Apparatus, method and flexible bag for use in manufacturing|
|US6828154||Nov 3, 2000||Dec 7, 2004||Cytologix Corporation||Staining method with chromic acid precursors|
|US6875539||Jan 18, 2002||Apr 5, 2005||Heiner Ophardt||Combination liquid dispenser and electrochemical cell|
|US6979311||Apr 16, 2001||Dec 27, 2005||Zevex, Inc.||Apparatus and method for preventing free flow in an infusion line|
|US7150727||Dec 11, 2002||Dec 19, 2006||Zevex, Inc.||Apparatus and method for preventing free flow in an infusion line|
|US7193531 *||Aug 10, 2004||Mar 20, 2007||Fujitsu Limited||Method for providing security|
|US7217392||Jun 9, 2004||May 15, 2007||Cytologix Corporation||Random access slide stainer with independent slide heating regulation|
|US7278553 *||Dec 5, 2005||Oct 9, 2007||Medical Instill Technologies, Inc.||One-way valve and apparatus using the valve|
|US7291126||May 29, 2003||Nov 6, 2007||Nilimedix Ltd.||Drug delivery device and method|
|US7311693||Apr 23, 2006||Dec 25, 2007||Nilimedix Ltd.||Drug delivery device and method|
|US7322491 *||Dec 5, 2005||Jan 29, 2008||Medical Instill Technologies, Inc.||Method of using one-way valve and related apparatus|
|US7367963||May 23, 2005||May 6, 2008||Zevex, Inc.||Apparatus and method for preventing free flow in an infusion line|
|US7425306||Sep 11, 2001||Sep 16, 2008||Ventana Medical Systems, Inc.||Slide heater|
|US7501283||Aug 11, 2003||Mar 10, 2009||Sakura Finetek U.S.A., Inc.||Fluid dispensing apparatus|
|US7530477||Nov 1, 2004||May 12, 2009||Gotohti.Com Inc.||Combination liquid dispenser and electrochemical cell|
|US7553672||May 14, 2007||Jun 30, 2009||Dako Denmark A/S||Random access slide stainer with independent slide heating regulation|
|US7615371||Dec 17, 2004||Nov 10, 2009||Ventana Medical Systems, Inc.||Method and apparatus for treating a biological sample with a liquid reagent|
|US7617952 *||Jan 30, 2006||Nov 17, 2009||Saleh George A||Dispenser for disinfecting gel|
|US7644842||Aug 31, 2007||Jan 12, 2010||Medical Instill Technologies, Inc.||Dispenser having variable-volume storage chamber and depressible one-way valve assembly for dispensing creams and other substances|
|US7648678||Dec 8, 2003||Jan 19, 2010||Dako Denmark A/S||Method and system for pretreatment of tissue slides|
|US7651291||Jun 4, 2007||Jan 26, 2010||Medical Instill Technologies, Inc.||Dispenser with one-way valve for storing and dispensing metered amounts of substances|
|US7718435||Oct 31, 2000||May 18, 2010||Dako Denmark A/S||Automated slide stainer with slide housing|
|US7744817||Feb 6, 2006||Jun 29, 2010||Sakura Finetek U.S.A., Inc.||Manifold assembly|
|US7758809||Dec 3, 2009||Jul 20, 2010||Dako Cytomation Denmark A/S||Method and system for pretreatment of tissue slides|
|US7767152||Feb 3, 2006||Aug 3, 2010||Sakura Finetek U.S.A., Inc.||Reagent container and slide reaction retaining tray, and method of operation|
|US7798185||Nov 5, 2007||Sep 21, 2010||Medical Instill Technologies, Inc.||Dispenser and method for storing and dispensing sterile food product|
|US7810677||Jan 5, 2007||Oct 12, 2010||Medical Instill Technologies, Inc.||One-way valve and apparatus and method of using the valve|
|US7815612||Sep 14, 2005||Oct 19, 2010||Zevex, Inc.||Apparatus and method for preventing free flow in an infusion line|
|US7850051||Jan 28, 2008||Dec 14, 2010||Medical Instill Technologies, Inc.||Apparatus having one-way valve|
|US7861750||Feb 4, 2008||Jan 4, 2011||Medical Instill Technologies, Inc.||Dispenser and apparatus and method of filling a dispenser|
|US7886937||Jan 11, 2010||Feb 15, 2011||Medical Instill Technologies, Inc.||Dispenser with variable-volume storage chamber, one-way valve, and manually-depressible actuator|
|US7937228||Mar 19, 2008||May 3, 2011||Dako Denmark A/S||Information notification sample processing system and methods of biological slide processing|
|US7960178||Dec 19, 2003||Jun 14, 2011||Dako Denmark A/S||Enhanced scheduling sample processing system and methods of biological slide processing|
|US7976513||Apr 5, 2004||Jul 12, 2011||Zevex, Inc.||Apparatus and method for selectively controlling flow in an infusion line|
|US7998121||Feb 5, 2010||Aug 16, 2011||Zevex, Inc.||Automatic safety occluder|
|US8104644||Oct 8, 2010||Jan 31, 2012||Medical Instill Technologies, Inc.||One-way valve and apparatus and method of using the valve|
|US8216512||Dec 19, 2003||Jul 10, 2012||Dako Denmark A/S||Apparatus for automated processing biological samples|
|US8220507||Sep 2, 2010||Jul 17, 2012||Medical Instill Technologies, Inc.||Dispenser and method for storing and dispensing sterile product|
|US8220662||Dec 18, 2007||Jul 17, 2012||Asept International Ab||Device for discharge or outfeed and discharge means for such device|
|US8240521 *||Feb 10, 2006||Aug 14, 2012||Medical Instill Technologies, Inc.||Fluid dispenser having a one-way valve, pump, variable-volume storage chamber, and a needle penetrable and laser resealable portion|
|US8240934||Jan 25, 2010||Aug 14, 2012||Medical Instill Technologies, Inc.||Dispenser with one-way valve for storing and dispensing substances|
|US8257968||Dec 19, 2003||Sep 4, 2012||Dako Denmark A/S||Method and apparatus for automatic staining of tissue samples|
|US8298815||Dec 22, 2003||Oct 30, 2012||Dako Denmark A/S||Systems and methods of sample processing and temperature control|
|US8343111||Sep 28, 2010||Jan 1, 2013||Zevex, Inc.||Anti-free flow mechanism for enteral feeding pumps|
|US8348104||Sep 10, 2007||Jan 8, 2013||Medical Instill Technologies, Inc.||Apparatus for dispensing fluids|
|US8356733||Sep 10, 2007||Jan 22, 2013||Medical Instill Technologies, Inc.||Method for dispensing fluids|
|US8376189||May 6, 2011||Feb 19, 2013||Alps Llc||Dispensing machine valve and method|
|US8386195||Mar 28, 2011||Feb 26, 2013||Dako Denmark A/S||Information notification sample processing system and methods of biological slide processing|
|US8394635||May 6, 2011||Mar 12, 2013||Dako Denmark A/S||Enhanced scheduling sample processing system and methods of biological slide processing|
|US8413854||Feb 15, 2011||Apr 9, 2013||Medical Instill Technologies, Inc.||Dispenser with variable-volume storage chamber, one-way valve, and manually-depressible actuator|
|US8425470||Oct 1, 2010||Apr 23, 2013||Zevex, Inc.||Anti-free-flow mechanism for enteral feeding pumps|
|US8459509||May 25, 2006||Jun 11, 2013||Sakura Finetek U.S.A., Inc.||Fluid dispensing apparatus|
|US8491543||Jul 22, 2011||Jul 23, 2013||Zevex, Inc.||Automatic safety occluder|
|US8529836||Jun 11, 2012||Sep 10, 2013||Dako Denmark A/S||Apparatus for automated processing biological samples|
|US8550308||Dec 3, 2007||Oct 8, 2013||Medical Instill Technologies, Inc.||Apparatus for dispensing fluids|
|US8580568||Sep 21, 2011||Nov 12, 2013||Sakura Finetek U.S.A., Inc.||Traceability for automated staining system|
|US8602259||Jan 31, 2012||Dec 10, 2013||Medical Instill Technologies, Inc.||One-way valve and apparatus and method of using the valve|
|US8627861||Jan 4, 2011||Jan 14, 2014||Medical Instill Technologies, Inc.||Dispenser and apparatus and method for filling a dispenser|
|US8663978||Aug 6, 2012||Mar 4, 2014||Dako Denmark A/S||Method and apparatus for automatic staining of tissue samples|
|US8672195||Nov 9, 2007||Mar 18, 2014||Medical Instill Technologies, Inc.||Device with chamber and first and second valves in communication therewith, and related method|
|US8673642||Feb 4, 2013||Mar 18, 2014||Dako Denmark A/S||Enhanced scheduling sample processing system and methods of biological slide processing|
|US8752732 *||Feb 1, 2011||Jun 17, 2014||Sakura Finetek U.S.A., Inc.||Fluid dispensing system|
|US8757436||Feb 15, 2008||Jun 24, 2014||Medical Instill Technologies, Inc.||Method for dispensing ophthalmic fluid|
|US8784735||Aug 12, 2013||Jul 22, 2014||Dako Denmark A/S||Apparatus for automated processing biological samples|
|US8788217||Jan 23, 2013||Jul 22, 2014||Dako Denmark A/S||Information notification sample processing system and methods of biological slide processing|
|US8870025 *||Apr 23, 2012||Oct 28, 2014||Nestec S.A.||Method and device for aseptically dispensing multiple portions of a fluid|
|US8876787||Mar 31, 2009||Nov 4, 2014||Zevex, Inc.||Anti-free-flow mechanism for enteral feeding pumps|
|US8910833||Feb 19, 2013||Dec 16, 2014||Alps, Llc||Dispensing machine valve and method|
|US8911414||Sep 29, 2011||Dec 16, 2014||Zevex, Inc.||Anti free-flow occluder and priming actuator pad|
|US8919614||Apr 9, 2013||Dec 30, 2014||Medinstill Development Llc||Dispenser with variable-volume storage chamber, one-way valve, and manually-depressible actuator|
|US8932543||Sep 21, 2011||Jan 13, 2015||Sakura Finetek U.S.A., Inc.||Automated staining system and reaction chamber|
|US8969086||Feb 18, 2014||Mar 3, 2015||Dako Denmark A/S||Enhanced scheduling sample processing system and methods of biological slide processing|
|US9005980||Oct 18, 2013||Apr 14, 2015||Sakura Finetek U.S.A., Inc.||Traceability for automated staining system|
|US9016526 *||Jun 5, 2014||Apr 28, 2015||Sakura Finetek U.S.A., Inc.||Fluid dispensing system|
|US9017296||Mar 31, 2009||Apr 28, 2015||Zevex, Inc.||Safety occluder and method of use|
|US9229016||Jun 17, 2014||Jan 5, 2016||Dako Denmark A/S||Information notification sample processing system and methods of biological slide processing|
|US9377338||Dec 29, 2014||Jun 28, 2016||Medinstill Development Llc||Dispenser with variable-volume storage chamber, one-way valve, and manually-depressible actuator|
|US9408455||Feb 5, 2010||Aug 9, 2016||MedInstill Development, LLC||Container and valve assembly for storing and dispensing substances, and related method|
|US9423041||Dec 16, 2014||Aug 23, 2016||Alps Llc||Dispensing machine valve and method|
|US9440773||Aug 10, 2012||Sep 13, 2016||Medinstill Development Llc||Device with one-way valve|
|US9469464 *||Nov 3, 2014||Oct 18, 2016||Roche Diagnostics Operations, Inc.||Microfluidic dispenser, cartridge and analysis system for analyzing a biological sample|
|US9518899||Feb 7, 2006||Dec 13, 2016||Sakura Finetek U.S.A., Inc.||Automated reagent dispensing system and method of operation|
|US9599630||Jan 9, 2014||Mar 21, 2017||Dako Denmark A/S||Method and apparatus for automatic staining of tissue samples|
|US9630755||Jul 17, 2012||Apr 25, 2017||Medinstill Development Llc||Dispenser and method for storing and dispensing sterile product|
|US9668914||Jun 24, 2014||Jun 6, 2017||Dr. Py Institute Llc||Method for dispensing ophthalmic fluid|
|US20020007156 *||Apr 16, 2001||Jan 17, 2002||Miles Scott D.||Apparatus and method for preventing free flow in an infusion line|
|US20030014945 *||Jul 19, 2001||Jan 23, 2003||Danby Hal C.||Apparatus, method and flexible bag for use in manufacturing|
|US20030100863 *||Nov 26, 2001||May 29, 2003||Avraham Shekalim||Fluid drug delivery device|
|US20030136666 *||Jan 18, 2002||Jul 24, 2003||Heiner Ophardt||Combination liquid dispenser and electrochemical cell|
|US20030216683 *||May 29, 2003||Nov 20, 2003||Nili-Med Ltd.||Drug delivery device and method|
|US20040052685 *||Jun 23, 2003||Mar 18, 2004||Ventana Medical Systems, Inc.||Automated molecular pathology apparatus having independent slide heaters|
|US20040060947 *||Sep 26, 2002||Apr 1, 2004||Papaikonomou Constantijn Thomas||Metering pump and valve assembly for use in the same|
|US20040094573 *||Nov 12, 2003||May 20, 2004||Baxter International Inc.||Flow control apparatus for use in dispensing fluent material|
|US20040096126 *||Nov 12, 2003||May 20, 2004||Baxter International Inc.||Flexible bag for use in dispensing a fluent material|
|US20040144799 *||Jan 24, 2003||Jul 29, 2004||Baxter International Inc.||Liquid dispenser and flexible bag therefor|
|US20040191128 *||Apr 12, 2004||Sep 30, 2004||Cytologix Corporation||Slide stainer with heating|
|US20040220542 *||Apr 5, 2004||Nov 4, 2004||David Cise||Apparatus and method for preventing free flow in an infusion line|
|US20040241050 *||Jun 9, 2004||Dec 2, 2004||Cytologix Corporation||Random access slide stainer with independent slide heating regulation|
|US20050009536 *||Aug 10, 2004||Jan 13, 2005||Fujitsu Limited||Method for providing security|
|US20050011908 *||Jul 16, 2003||Jan 20, 2005||Baxter International, Inc.||Dispenser and pressure/vacuum converting machine|
|US20050035156 *||Aug 11, 2003||Feb 17, 2005||Michael Hersch||Fluid dispensing apparatus|
|US20050064281 *||Nov 1, 2004||Mar 24, 2005||Heiner Ophardt||Combination liquid dispenser and electrochemical cell|
|US20050119625 *||Oct 3, 2003||Jun 2, 2005||Scott Miles||Apparatus and method for preventing free flow in an infusion line|
|US20050155987 *||Oct 28, 2004||Jul 21, 2005||Daniel Py||Container and valve assembly for storing and dispensing substances, and related method|
|US20050164374 *||Dec 17, 2004||Jul 28, 2005||Ventana Medical Systems, Inc.||Method and apparatus for efficient thin film fluid processing of flat surfaces|
|US20050283121 *||May 23, 2005||Dec 22, 2005||David Cise||Apparatus and method for preventing free flow in an infusion line|
|US20060058740 *||Sep 14, 2005||Mar 16, 2006||David Cise||Apparatus and method for preventing free flow in an infusion line|
|US20060147351 *||Jun 9, 2004||Jul 6, 2006||Dako Denmark A/S||Diaphram metering chamber dispensing systems|
|US20060151051 *||Dec 5, 2005||Jul 13, 2006||Daniel Py||One-way valve and apparatus using the valve|
|US20060169722 *||Dec 5, 2005||Aug 3, 2006||Daniel Py||Method of using one-way valve and related apparatus|
|US20060206054 *||Apr 23, 2006||Sep 14, 2006||Nilimedix Ltd.||Drug delivery device and method|
|US20070039976 *||Jan 30, 2006||Feb 22, 2007||George Saleh||Dispenser for disinfecting gel|
|US20070138208 *||Dec 16, 2005||Jun 21, 2007||3M Innovative Properties Company||Dispenser|
|US20070194045 *||Jan 5, 2007||Aug 23, 2007||Daniel Py||One-way valve and apparatus and method of using the valve|
|US20070281364 *||May 14, 2007||Dec 6, 2007||Bogen Steven A||Random access slide stainer with independent slide heating regulation|
|US20080078781 *||Sep 10, 2007||Apr 3, 2008||Daniel Py||Method for dispensing fluids|
|US20080083788 *||Sep 10, 2007||Apr 10, 2008||Daniel Py||Apparatus for sealing and engaging sterile chambers|
|US20080105711 *||Nov 6, 2006||May 8, 2008||Kirimli Lynn A||Dispensing apparatus|
|US20080105712 *||Aug 31, 2007||May 8, 2008||Daniel Py||Dispenser having variable-volume storage chamber and depressible one-way valve assembly for dispensing creams and other substances|
|US20080116225 *||Sep 10, 2007||May 22, 2008||Daniel Py||Apparatus for dispensing fluids|
|US20080116226 *||Dec 3, 2007||May 22, 2008||Daniel Py||Apparatus for dispensing fluids|
|US20080149191 *||Jan 28, 2008||Jun 26, 2008||Daniel Py||Method of Using One-Way Valve and Related Apparatus|
|US20090053107 *||Nov 18, 2005||Feb 26, 2009||Danfoss A/S||Microfluid device and method for setting up a microfluid device|
|US20090253592 *||Jun 12, 2009||Oct 8, 2009||Kram Brian H||Method and apparatus for treating a biological sample with a liquid reagent|
|US20090254034 *||Mar 31, 2009||Oct 8, 2009||Kent Beck||Safety occluder and method of use|
|US20090263176 *||Apr 21, 2009||Oct 22, 2009||Mileti Robert J||Replaceable Cartridge Dispenser Assembly|
|US20100082001 *||Mar 31, 2009||Apr 1, 2010||Kent Beck||Anti-free flow mechanism for enteral feeding pumps|
|US20100204651 *||Feb 5, 2010||Aug 12, 2010||Mark Stringham||Automatic safety occluder|
|US20100213210 *||Dec 18, 2007||Aug 26, 2010||Asept International Ab||Device for discharge or outfeed and discharge means for such device|
|US20110024463 *||Oct 8, 2010||Feb 3, 2011||Daniel Py||One-way valve and apparatus and method of using the valve|
|US20110028899 *||Sep 28, 2010||Feb 3, 2011||Kent Beck||Anti-free flow mechanism for enteral feeding pumps|
|US20120193376 *||Feb 1, 2011||Aug 2, 2012||Sakura Finetek U.S.A., Inc.||Fluid dispensing system|
|US20120248147 *||Mar 28, 2011||Oct 4, 2012||Fluid Management Operations, Llc||Apparatus for Dispensing a Plurality of Liquids|
|US20130333492 *||Jun 11, 2013||Dec 19, 2013||Matthias Wochele||Test device for a liquid dispenser|
|US20140284358 *||Jun 5, 2014||Sep 25, 2014||Sakura Finetek U.S.A., Inc.||Fluid dispensing system|
|US20150048119 *||Nov 3, 2014||Feb 19, 2015||Roche Diagnostics Operations, Inc.||Microfluidic dispenser, cartridge and analysis system for analyzing a biological sample|
|USD672455||Oct 1, 2010||Dec 11, 2012||Zevex, Inc.||Fluid delivery cassette|
|CN101107176B||Dec 5, 2005||Apr 18, 2012||因斯蒂尔医学技术有限公司||Flexible bag and assembly of valves, and device and method for storing and distributing fluid|
|CN101309754B||Nov 18, 2005||Feb 8, 2012||弗劳森有限公司||微流体设备和用于构建微流体设备的方法|
|CN101391671B||Sep 19, 2008||Jun 27, 2012||株式会社三辉||Apparatus for extracting the contents from a refill pouch|
|CN102985180A *||May 6, 2011||Mar 20, 2013||泰肯贸易股份公司||Dispenser and process for releasing flowable materials|
|EP1243217A1 *||Mar 14, 2001||Sep 25, 2002||QTS S.r.L.||Dispenser for pasty detergents, particularly in the form of gel with microspheres|
|EP1284760A1 *||May 3, 2001||Feb 26, 2003||Zevex, Inc.||Apparatus and method for preventing free flow in an infusion line|
|EP1284760A4 *||May 3, 2001||Aug 29, 2007||Zevex Inc||Apparatus and method for preventing free flow in an infusion line|
|EP1886146B1 *||May 29, 2006||Apr 6, 2011||Scienion AG||Microdispenser and associated operating method|
|EP2039621A3 *||Sep 19, 2008||May 26, 2010||Kabushiki Kaisha Sanki||Apparatus for extracting the contents from a refill pouch|
|EP2099707A1 *||Dec 18, 2007||Sep 16, 2009||Asept International Ab||Device for discharge or outfeed and discharge means for such device.|
|EP2099707A4 *||Dec 18, 2007||May 4, 2011||Asept Int Ab||Device for discharge or outfeed and discharge means for such device.|
|EP2378121A1 *||Apr 16, 2010||Oct 19, 2011||Veinux ApS||Pump element for a tube pump|
|EP2947318A1 *||Apr 15, 2011||Nov 25, 2015||Veinux ApS||Pump element for a tube pump|
|WO2001085231A1||May 3, 2001||Nov 15, 2001||Zevex, Inc.||Apparatus and method for preventing free flow in an infusion line|
|WO2006048678A2 *||Nov 7, 2005||May 11, 2006||Randox Laboratories Ltd||Reagent holding bag|
|WO2006048678A3 *||Nov 7, 2005||Dec 21, 2006||Sonya Ferguson||Reagent holding bag|
|WO2006063000A2 *||Dec 5, 2005||Jun 15, 2006||Medical Instill Technologies, Inc.||One-way valve, apparatus and method of using the valve|
|WO2006063000A3 *||Dec 5, 2005||Sep 8, 2006||Medical Instill Tech Inc||One-way valve, apparatus and method of using the valve|
|WO2007057038A1 *||Nov 18, 2005||May 24, 2007||Danfoss A/S||Microfluid device and method for setting up a microfluid device|
|WO2010025826A2 *||Aug 19, 2009||Mar 11, 2010||Scienion Ag||Pressure control member, in particular a ventilating valve for ventilating a microdispenser|
|WO2010025826A3 *||Aug 19, 2009||Apr 29, 2010||Scienion Ag||Pressure control member, in particular a ventilating valve for ventilating a microdispenser|
|WO2011128440A1 *||Apr 15, 2011||Oct 20, 2011||Veinux Aps||Pump element for a tube pump|
|WO2011141357A1 *||May 6, 2011||Nov 17, 2011||Tecan Trading Ag||Dispenser and process for releasing flowable materials|
|U.S. Classification||222/207, 222/181.2, 222/214, 222/454, 417/412, 137/859, 417/479, 417/480, 222/450, 222/325, 417/478, 222/455, 222/182|
|International Classification||B01J4/00, B67D7/02, B67D3/00, B01L99/00, F04B43/08, G01N35/10, F04B23/02, F16K15/14, F04B53/10, G01N1/31, G01N35/04, B05B11/00|
|Cooperative Classification||B05B11/3032, G01N35/1016, B05B11/0072, B67D7/0216, B01L3/0296, B05B11/3067, G01N2035/0443, G01N1/312, F04B53/107, B05B11/007, G01N35/1002, F04B23/025, F04B43/08, F16K15/144|
|European Classification||B05B11/30E6, B01L3/02H2, B05B11/00B9T, B05B11/30H7B, F04B53/10F4F6A, G01N35/10A, F04B43/08, F04B23/02C, F16K15/14H, B05B11/00B9R, B67D7/02C|
|Feb 10, 1998||AS||Assignment|
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